Tape player having simplified mechanical parts

The invention relates to a tape reproducing apparatus according to the preamble of claim 1.

From FR 26 79 060 already tape playback device with a horizontally arranged cam disk be for controlling various functions of the device known. In the upper and in the lower surface the cam control grooves are formed in each of which a pin engages. During a rotation of the cam guide the pins through the control utes of predetermined movements which turn on Lever act. The individual levers are pre-admit assigned ne functions of the device, the ge in controlled movement of the lever are carried out.

However, such tape playback devices have a complicated mechanical structure, ei by at ner assembly and also during a repair of the appliance major difficulties.

It is therefore an object of the present invention, on Tape reproducing apparatus having a first, second, DRIT and fourth pin which, in a first, second third and fourth groove which in a scheibenförmi provided gen cam intervene in the respective grooves in accordance with the rotation of the disc-shaped cam (<b>30</b>) To move, what a Member having a first lever which is linear in a Movement together with a linear movement of he first pin works to a loading / unloading carry out a cassette tape, which he with the first lever by the actuation of the first lever in Engagement occurs, a member having a second lever, together with the movement of the second pin ar processed to a moving operation of a head plate on the basis of the actuation of the second lever perform an element with a third lever, together with the movement of the third pin ar processed to a switching operation of the Playback Autonomy direction on the basis of the operation of the third Lever to perform, and an element having a four th lever, which together with the movement of the fourth Pin works to a selective operation for Transmitting the driving force to a cassette tape Drive mechanism during fast forward and fast reverse on the basis of Actuate tion of the fourth lever perform, including, where in the first groove for the loading / unloading operation and the third groove for the switching operation of the reproducing Direction in a first surface of scheibenför shaped cam are provided and the second groove for the headstock moving operation and the fourth groove for the selective operation for transmitting the at driving force to the cassette tape drive mechanism during fast forward in a second FLAE Che are provided to improve in such a way that the first to fourth groove of further grooves to unify the thickness of the cam can be clearly distinguished.

This object is achieved by the Tape reproducing apparatus according to claim 1. Advantageous Further developments of the inventive tape playback unit will emerge from the dependent claims.

Characterized in that a difference in groove width between tween the first groove and the third groove in the disposed first face of the disk-shaped cam are, and / or between the second groove and the four th groove is in the second surface of the cam are arranged, is provided, and the pins in each case meet one of the groove width of the associated groove same diameter, can be easily detected be whether a pin and a groove intended belong together or not. If this is not the case , then either the pin not in the Groove to be introduced or the pin has considerable Game in the groove. Thus, there is no risk that during assembly or repair a pen in egg ne this unallocated slot is used.

Furthermore, it is characterized in that disc-shaped in the Cams other than the first to fourth grooves vorgese are hen and these grooves ribs verhin amended so that the pin during assembly in these other Grooves occurs by a simple differentiation between the first and fourth grooves and the other Grooves is made possible. That is, in a tape reproducing apparatus according to the present invention, Rib for other than the first to fourth groove the disk-like cam is provided and thereby the grooves in the one disc-like cam clear can be distinguished.

According to an advantageous embodiment be at four Operations including Kassettenbandlade- / Unloading operation, the headstock movement Opera tion, the switching operation for the Playback Autonomy direction and the selective operation for transferring the driving force to the cassette tape drive mechanism during fast forward the Opera tions corresponding to the rotation of the disc-shaped Cam of a starting point in the following Direction performed: cassette tape Einbringmodus and mode for arranging the cassette tape to the Cassette tape drive mechanism mode of the high- len runnings and fast rewind in the L direction the tape playback mode in the R direction of the tape, Playback mode in the L direction of the band and mode fast forward in R-direction of the belt.

It allows only a disk-like cams to Kassetteneinbringmodus and mode for arranging the Cassette tape of the cassette tape Antriebsmecha mechanism, the operation of fast forward in L- Direction of the tape, the reproduction operation of the Ban the in the R direction, the reproduction operation in L- Direction of the belt and the operation of the rapid Runnings in R-direction of the belt.

The invention will in the following with reference to the Exemplary embodiments shown in more detail explained.

<b>Fig.</b> 1 is a plan view of a Ausführungsbei playing a first surface of the cam gear wheel according to the present invention.

<b>Fig.</b> 2 is a plan view showing a Ausführungsbei play a second surface of a cam gear according to the present invention shows.

<b>Fig.</b> 3 is a transition diagram Ope the rationsfolge in the embodiment of Cam gear according to the present inven represents education.

As in the <b>Fig.</b> 1 and 2 is shown, grooves are in the top and bottom of the cam gear <b>30</b> pre see and the respective grooves have different Widths corresponding to the diameters of the pins, where prevents that a pin in error a wrong groove engages. Moreover, in order a during the formation of the cam gear <b>30</b> generated To avoid deformation, are grooves with reduced as well as the grooves are provided above thickness to a vorzuse uniform thickness for the entire gear hen. ribs<b>138</b> extend vertically Rich device to the gear, in order to prevent that the pin during assembly into the grooves with verringer ter thickness occurs, whereby a simple sub-Schei connection between the groove and the verringer in thickness th groove is effected. The respective grooves four operations control, that is, the first groove <b>139</b> controls a Kassettenbandlade- / unloading, the third groove <b>140</b> controls a switching operation of the Play-direction, the second groove <b>141</b> controls a head drive operation and the fourth groove <b>142</b> controls a selective operation to the drive force during the fast forward to the spool support equipment transfer.

As in <b>Fig.</b> is shown 3, the above four Operations controlled by soft eight modes are, in the order in which the Drehwin kel is greater, include the following modes: Ejection mode (hereinafter referred to as EJ-mode), Stop mode (hereinafter referred to as STP-mode), Mode for fast forward in L-direction (Fol lowing as FL-mode), mode of fast Runnings with direct access to L-direction (Fol lowing as AL-mode), R-PLAY mode (R- Game Mode) (hereinafter referred to as RP mode) L-PLAY mode (L-game mode) (hereinafter referred to as LP Mode), the fast forward mode with direct access in the R direction (hereinafter referred to as AR Mode) and mode for fast forward in R-direction (referred to as FR mode hereinafter. As additionally only a cam gear is provided Kings NEN modes not in another operation art jumping. That is, when the operation of the FL mode progresses in the FR mode, which Target mode will not be reached before not kurzzei tig the AL mode, the RP mode, the LP mode and the AR mode is gone, which in the operating modes History of progressive operation serve.

Another mode is a mode for the co bly is provided in which no load at all the aforementioned four operations during the Fort exceeding of the operations of the EJ-mode to the STP mode is applied. In assembly, the Gear in the mode positioned to the assembly simplify. In the assembling mode, a rib <b>138</b>a of the cam gear <b>30</b> in the same Stel ment brought as a hole in a main chassis. In addition, the third groove <b>140</b> a narrow re groove width than the first groove <b>139</b> on to verhin to countries that the associated pin in another groove engaged as the first groove <b>139</b>When a SIDE siseinheit is mounted.